Search: id:A035925
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%I A035925
%S A035925 1,19208,61504016,78823543064,54174273131552,23200998588819240,
%T A035925 6787317128471047728,1443372362804937698616,233388899309424919685184,
%U A035925 29689738444840209923490632,3051938054812173149666009680
%N A035925 Coordination sequence for diamond structure D^+_98. (Edges defined by 
               l_1 norm = 1.)
%D A035925 J. Serra-Sagrista, Enumeration of lattice points in l_1 norm, Information 
               Processing Letters, 76, no. 1-2 (2000), 39-44.
%H A035925 J. H. Conway and N. J. A. Sloane, Low-Dimensional Lattices VII: Coordination 
               Sequences, Proc. Royal Soc. London, A453 (1997), 2369-2389 (<a href="http:/
               /www.research.att.com/~njas/doc/ldl7.txt">Abstract</a>, <a href="http:/
               /www.research.att.com/~njas/doc/ldl7.pdf">pdf</a>, <a href="http:/
               /www.research.att.com/~njas/doc/ldl7.ps">ps</a>).
%p A035925 f := proc(m) local k,t1; t1 := 2^(n-1)*binomial((n+2*m)/2-1,n-1); if 
               m mod 2 = 0 then t1 := t1+add(2^k*binomial(n,k)*binomial(m-1,k-1),
               k=0..n); fi; t1; end; where n=98.
%Y A035925 Sequence in context: A051795 A089522 A015302 this_sequence A031831 A126721 
               A140930
%Y A035925 Adjacent sequences: A035922 A035923 A035924 this_sequence A035926 A035927 
               A035928
%K A035925 nonn
%O A035925 0,2
%A A035925 J. Serra-Sagrista (jserra(AT)ccd.uab.es) Recomputed by N. J. A. Sloane 
               (njas(AT)research.att.com) Nov 27 1998.

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